One reason your OneNote Notebook is unable to sync is that your Internet connection is poor. To confirm this, we need to check the bandwidth. You can do this by using one of the free Internet speed ...

The error message indicates that OneNote cannot connect to the server. This usually happens when the internet connection is unstable. Check your network connection ...

Microsoft has released KB5002500 for OneNote 2016 to stop the program from crashing whenever users tried to sync notebooks that were shared to them from newer versions of Microsoft OneNote. Microsoft ...

Microsoft is aggressively pushing users off older OneNote app by degrading its performance, slowing sync speeds starting June 2025. Legacy OneNote for Windows 10 reaches end of support in October 2025 ...